Keystones — Lintel
Five GCSE retrieval questions · 4 March 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
0.0009
Answer: 9 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + 2x - 8
Answer: (x + 4)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 29cm, angle = 65°. Find adjacent side
Answer: 12.3cm -
4. Ratio Mixed ratio problems
Divide 130 in the ratio 3:3:4
Answer: 39, 39 and 52 -
5. Statistics Mean
Calculate the mean of: 50, 50, 9, 23, 42, 30, 41
Answer: 35